katahira masashi, murmeltier, busou shinki, 10s, 1girl, :o, ass, back, black background, black thighhighs, blue eyes, bodysuit, breasts, character name, doll joints, female focus, from behind, gloves, gradient background, gun, holding, holding weapon, joints, kneepits, leotard, looking at viewer, looking back, open mouth, pink hair, profile, rifle, short hair, small breasts, solo, standing, thigh gap, thighhighs, weapon